Silence some -Wstring-conversion warnings

lldbassert(!"foo") -> lldbassert(0 && "foo")

In one case, this actually detected a logic error in the assertion (missing !).

llvm-svn: 291102
diff --git a/lldb/source/Expression/IRMemoryMap.cpp b/lldb/source/Expression/IRMemoryMap.cpp
index 008838d..7b9d266 100644
--- a/lldb/source/Expression/IRMemoryMap.cpp
+++ b/lldb/source/Expression/IRMemoryMap.cpp
@@ -126,7 +126,7 @@
         err = process_sp->GetMemoryRegionInfo(
             region_info.GetRange().GetRangeEnd(), region_info);
         if (err.Fail()) {
-          lldbassert(!"GetMemoryRegionInfo() succeeded, then failed");
+          lldbassert(0 && "GetMemoryRegionInfo() succeeded, then failed");
           ret = LLDB_INVALID_ADDRESS;
           break;
         }